Cleaning and bleaching liquid composition

ABSTRACT

A TRANSPARENT LIQUID DETERGENT COMPOSITION, EXCELLENT IN BLEACHING AND CLEANING PROPERTIES, CONSISTING ESSENTIALLY OF A SURFACE ACTIVE AGENT REPRESENTED BY A GENERAL FORMULA,   (4-R-PHENYL)-O-(CH2-CH2-O)N-(CH2)M-COO-M   (WHEREIN R STANDS FOR AN ALKYL GROUP HAVING 8 TO 22 CARBON ATOMS, N IS AN INTEGER OF 1 TO 40, M IS AN INTEGER OF 1 OR 2 AND M IS AN ALKALI METAL), AN ALKALI METAL HYPOCHLORITE AND AN ALKALI AGENT DISSOLVED IN WATER, SAID ALKALI METAL HYPOCHLORITE CONTAINING LESS THEN 1/10 MOL OF ALKALI METAL CHLORIDE PER MOL OF THE HYPOCHLORITE AND THE AVAILABLE CHLORINE CONTENT OF THE COMPOSITION BEING 0.5-13% BY WEIGHT.

Patented Sept. 11, 1973 US. Cl. 252-99 3 Claims ABSTRACT OF THE DISCLOSURE A transparent liquid detergent composition, excellent in bleaching and cleaning properties, consisting essentially of a surface active agent represented by a general formula,

(wherein R stands for an alkyl group having 8 to 22 carbon atoms, n is an integer of 1 to 40, m is an integer of l or 2 and M is an alkali metal), an alkali metal hypochlorite and an alkali agent dissolved in water, said alkali metal hypochlorite containing less than mol of alkali metal chloride per mol of the hypochlorite and the available chlorine content of the composition being 0.5-13% by weight.

This invention relates to a cleaning and bleaching liquid composition containing hypochlorite.

More particularly, it relates to a cleaning and bleaching liquid composition, characterized by consisting of a surface active agent represented by a general formula (1) a--o(cnzcmonwnnm-coom (1) (wherein R stands for an alkyl group having 8 to 22 carbon atoms, 11 is an integer of l to 40, M is an integer of 1 or 2 and m is an alkali metal), an alkali metal hypochlorite and an alkali agent as indispensable components, dissolved in water, said alkali metal hypochlorite containing less than A mol of an alkali metal chloride per mol of the hypochlorite and the available chlorine content of the composition being 0.5-13% by weight.

There have been presented various surface active agents that are dissolved stably in sodium hypochlorite solution; for example, there are sodium alkyldiphenyloxide sulfonate (Japanese patent publication No. 6,268/ 1963 and USP No. 3,172,861), a compound represented by a general formula,

RO(CH CI-hO) S0 Me (wherein R is an alkyl group having 8 to 9 carbon atoms, Me is an alkali metal, and n is an integer of to 40) (Japanese patent publication No. 2,103/ 1968), and a compound represented by a general formula,

sum up to 17, X is a member of the group consisting of --COOMe, --SO Me, OSO Me, or

Y is a member of the group consisting of COOMe or OSO Me, and Me is an alkali metal) (Japanese patent publication No. 7,976/1970).

These compounds are, however, not satisfactory in all the required properties such as solution stability, cleaning property, wetting power, foaming power and softening property.

We have found that the surface active agent represented by the above-described Formula 1 is a compound that can satisfy all of these required properties.

A conventional commercially-available bleaching liquid employs a hypochlorite containing an equimolar amount of an alkali metal chloride, as it is the most economical; however, the alkali metal hypochlorite used in the composition of this invention (usually the sodium or potassium salt) contains either no alkali metal chloride or less than A mol per mol of the alkali metal chloride of the hypochlorite.

The stability of a hypochlorite solution depends on the strength of the ions contained in it, but in the system containing a surface active agent represented by the Formula 1, the decomposition of the surface active agent due to sodium hypochlorite and the decomposition of sodium hypochlorite has been found to be much more influenced by the presence of sodium chloride, than by sodium sulfate or sodium orthophosphate, even with the same strength of ions.

In the present invention, accordingly, it is important for the stability of the composition to remove alkali metal chlorides which will particularly accelerate the decomposition of the surface active agent by hypochlorite, in addition to lowering the strength of ions of inorganic salts.

The amount of the surface active agent of the Formula 1 used in the composition of this inventionis about 0.5 to 20% by weight of the composition.

The amount of the hypochlorite used is selected so as to make the available chlorine content in the composition to be about 0.5 to 13% by weight. When the content is less than 0.5%, the bleaching effect is unsatisfactory and when it is more than 13%, the composition tends to be unstable.

As the alkali agent, alkali metal hydroxides are the most preferable, but carbonates, orthophosphates or metasilicates may be used. When the composition is to be stored particularly for a long time, alkali metal hydroxides such as sodium hydroxide and potassium hydroxide are preferable.

These alkali agents are effective for the stabilization of the surface active agent and act as a buffer for the system. The amount of the alkali agent to be used in the composition of this invention is 0.5 to 2.0% by weight, preferably 0.8 to 1.3% by weight of the composition.

The composition of this invention is a transparent liquid detergent that undergoes neither the decomposition of the hypochlorite and the surface active agent nor any turbid precipitation even after storing it for a long time, and it is excellent in its bleaching and cleaning properties.

The invention will be explained by several illustrative examples wherein percent are all by weight.

Bleaching and cleaning liquor compositions A, B, C, D and E having 6.0% of the available chlorine concentration were prepared according to the above-described composition with different surface active agents, which are shown A composition prepared with a sodium hypochlorite sobelow: lution (the available chlorine, 12.3%; sodium chloride, 11.16%) containing sodium chloride in an amount almost Composition Surface WW6 agent similar as the amount of sodium hypochlorite, separated A CHEW nto two layers, when it was used in compositions similar to those of compositions F to K.

SOaNB SOsNa EXA 3 CORPQWCHQCHNMSOaNa The following compositions were prepared with a so 7 e dium hypochlorite solution with a low sodium chloride 0 content (available chlorine, 12.50%; sodium chloride, coHn o(omcmmsoaNa 0.80%) and a sodium hypochl ri e Solution With a high sodium chloride content (available chlorine content, D O CH CH O CH COON 12.34%; sodium chloride, 10.2%).

I a C01 in i 2 )s 2 TABLE 3 E Composition, percent L M N 0 m- -0 (CHgCH)1zCHzCOONa I Sodrumhypochlorrte (astheavarlablechlorine)..- 6.0 6.0 6.0

The stability and the foaming power were determined 20 CHn-O(CHiCH 0)n0HiCo0Na 4.0 4.0 for each composition, and the results are shown in Table 1. NaO 1 i 1 NaCl 0.4 5.0 5.0 TABLE 1 Water Balance A B o D E ta l y oftthe {g s 3-33 2 98 3% 3% 33? 5 The composition L remained stable and transparent or ace ac 've er rea men :tzent, per cent. Decomposition rate 0.7 7.0 8.0 1.3 1.7 after Storing at room te'mperature and a C; 3 Stability otthe Initial stag $.00 g-gg 51g 2g g-gg months, but the composition M had a high viscosity ust iiltl Bltcillf assassinate; if; enen blending and eepeneeee no inyene enen leaving Foaming power n 4 g $3; 1 8 i 3 at room temperature. The composition L had 5.13% izg pmpfmy lenmeye sk 'providd 3 available chlorine content after storing at room temperaamso asam GWGXB DU ll'la CC. I i I a with ar i air condenser? and heated at 90 C. for 5 hours to accelerate deture for 6 months a closed Contalnerg Could be used yw at f m t t (with 0 27 oneentmt. n t mo tem r as a detergent for diapers. The composition N was a comture 3 iiiin3ain1 ii sied are the mn m n of Wags). m 3 p o Similar to a conventional commercially-available glgrgm e c fi y avatilable g i i pp 5 3 1 7; 9 g 9 bleaching liquor, and had 5.20% available chlorine con- 8 Of 11111111 88, was 1e 11 3. W8 er S ream an ['16 W1 51!. The treatment was repeated 10 times to prepare samples. The relative 3O tent after g at room temperature 6 monthss olt r ss 0t th imp m m 2y p l g 0 p rsons who assigned The wetting power of the 1% solution was 45 seconds 0 e S m 85 8 ran '1 S O O 111 1e 01 er 0 801085 ng SO H9583 e Tlie avgragg of the rankings average by the test panel are listed. The Wlth the composltlor} accorfimg to felt Sedlmentatlon small r t figure the softer is the Sample test, but the composition N did not sink after 300 seconds.

. What we claim is: g g that the collinpisltlons g 1. A cleaning and bleaching liquid composition conaccor mg 0 e mven are exce en as a W sisting essentially of an aqueous solution of EXAMPLE 2 (A) from about 0.5 to about 20%, by weight of the The compositions Shown in Table 2 were prepared composition, of surface active agent of the formula with a sodium hypochlorite solution (available chlorine, -0(CH OHz0)n(GH )mC00M 12.5%; sodium chloride, 0.8%).

TABLE 2 Composition, percent F G H I J K Sodium hypochlorite (as available chlorine) 6.0 5. 5 6. 5 6.0 6.0 4. 0 Odin-QO(CHzCH2O) CHzGOONa-. 2.0 3.0 o H -Q-O omomoncmoooNn 3.0 4.0 CQHWQO orizonionomcmooomu- 4.0 1.0

C12H25Q-0(CHzCH20)10CH2COON3 4.0 1.0

NnOH 1.0 1.0 1.0 .0 1.0 1.0 Water Balance Each composition was stored at 5 C. for 30 days but 5 wherein it was still transparent and did not show any turbid precipitation. The available chlorine concentrations after 15 alkyl havlng 3 to 22 afb011 aloms, storing at 30 C. for 20 days are as follows: 11 is an integer of l to 40,

Percent in is an integer of 1 or 2, and F 5.60 M is an alkali metal, G 5.08 (B) an alkali metal hypochlorite selected from the H 6.12 group consisting of sodium hypochlorite and potassium hypochlorite, said alkali metal hypochlorite containing less than A mol of alkali metal chloride per mol of the hypochlorite and the available chlo- 6 rine content of the composition being from 0.5 to References Cited 13.0% by g and UNITED STATES PATENTS (C) from about 0.5 to 2.0%, by weight of the compo- 2 302 715 3 1957 Hodel- 8 1( 3 X sition, of alkali agent selected from the group con- 5 ,2 7 11/ 1966 Aig gp r e et al- 2gg 7 H n i 2, 2,8 8 12/1953 Bran on 2 187 H sistlng of hydrox1des, carbonates, orthophosphates 1,834,210 12/1931 Hershann 232 187 H and metasilicates of sodium or potassium. 2. A cleaning and bleaching liquid composition as OTHER REFERENCES claimed in claim 1, in which the amount of said alltali 10 f i g agent is from 0.8 to 1.3% by weight of the composition.

3. The cleaning and bleaching liquid composition as MAYER WEI'NBLATT Primary Examiner claimed in claim 1, in which said alkali agent is sodium US. Cl. X.R. or potassium hydroxide. 15 3-103; 23 s 252-95, 187 H 

